S
M
T
W
T
F
S
26
67°
28°
27
70°
30°
28
60°
44°
29
50°
36°
30
48°
31°
1
48°
29°
2
46°
28°
3
52°
41°
4
62°
43°
5
50°
36°
6
52°
37°
7
48°
35°
8
49°
36°
9
49°
36°
10
51°
37°
11
51°
37°
12
56°
40°
13
59°
38°
14
61°
40°
15
57°
37°
16
58°
40°
17
58°
42°
18
59°
46°
19
62°
46°
20
67°
47°
21
66°
47°
22
65°
43°
23
60°
46°
24
64°
41°
25
60°
40°
26
61°
47°
27
61°
48°
28
69°
49°
29
65°
46°
30
62°
42°
31
62°
40°
1
61°
41°
2
61°
41°
3
63°
42°
4
63°
43°
5
64°
47°
6
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gravenhurst
Gravenhurst's May 2026 forecast shows daily high temperatures ranging from 46° to 69°, with overnight lows between 28° and 49°. The average high for May is 58° with an average low of 41°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Gravenhurst. See also: June | July | August.
